{
  "manageEntity": {
    "action": "Save",
    "entityId": "325182516",
    "entityType": "Track",
    "nonce": "0xdcf0497ba2de0715ba4c5cf867e1b1b538e42e6b01767203a10bd6753c90bd34",
    "signature": "0xd55a09e3551e04715ecb7e675f77ecc4983111555cc3618d6af200544eeb64df45051011b2608df24a187b79cac0174aae422992ee217d08b70be7ba5575d5ed1b",
    "signer": "0x5d8091c5439F52184dFD827f33FF815dCc827bA8",
    "userId": "52403052"
  }
}