{
  "manageEntity": {
    "action": "Save",
    "entityId": "2061681672",
    "entityType": "Track",
    "nonce": "0xddd7f4e266223962d2afc0f3780c884dfcb7fe3a62cbcb9eb6feae175ef6e037",
    "signature": "0x6cdddb1cdacaccb29901a82337fdd713ec81387f714833f8b10861051d358b20166ace1e54507920e2e2dcd843ebef01076dd934e8fcef37780bbfd0e88495ad1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}