{
  "manageEntity": {
    "action": "Save",
    "entityId": "152528336",
    "entityType": "Track",
    "nonce": "1790045713894875441",
    "signature": "0x38ead2b61321fadf2c0564634bf8dc60baaf51794d732534cd5e6d55977e890965d4df0090c103b2cb2e2072ee0760cbdf6bfef370bda63529855a7829751b431c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}