{
  "manageEntity": {
    "action": "Save",
    "entityId": "1780774284",
    "entityType": "Track",
    "nonce": "0x68ae11033e73bf77d7eef47be971dc132a31b52683fa107d8c575588668da752",
    "signature": "0xe41a592edab77b1168e2db7e0d2abd82bf9254159cb250257702878a7a51e04c6804fb1cf9d30e983fb5a0b0e6526111264718b30ff62df7ddfa65e11c406e561c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}