{
  "manageEntity": {
    "action": "Save",
    "entityId": "252575",
    "entityType": "Track",
    "nonce": "0xa6343f936053c6c4d38da30cc85d96b15be804d0b7addf9773668ae88e779e88",
    "signature": "0x1be19ce2f69ca08898919485b939cf4e6bed2e160245f9e3e3d1d8905e7cb2276432403021d378c9ba938006347e8b1763ee27da146cf3fdfe86f461d8dfa13c1c",
    "signer": "0x380Ec65A36A1655B8F92293e21aA15581356Fa85",
    "userId": "142361762"
  }
}