{
  "manageEntity": {
    "action": "Save",
    "entityId": "811154719",
    "entityType": "Track",
    "nonce": "0xbd8dcb618820ac2565d757ede964be323e008fbceb4e447f1cf9fb86c816187a",
    "signature": "0xb334373604cdd5fcc969ad9daaf4cfd0b55baeb90b4a8f66bcdd68d7e09f7ead21afabba94756c1f924f750dd726ad6a1c117c0ecd48df812c9f2b938c7cf1031c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}