{
  "manageEntity": {
    "action": "Save",
    "entityId": "1006952458",
    "entityType": "Track",
    "nonce": "0x502aadb66a27687a767f8cf113320335d525e7f1bd26d27695878085a6785f12",
    "signature": "0x849a530663806f3aacfc89b4753240d4b33e7e854d0755e7fcef7d3eacb8d3a66c1a4726986a137821d43e3648a0ca70f46a36a9385e552763079ac528af14851b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}