{
  "manageEntity": {
    "action": "Save",
    "entityId": "1066169344",
    "entityType": "Track",
    "nonce": "0xd3c71562d24bef91d6e0844a2970ff7f320e319f371f43af899b5d71329475c0",
    "signature": "0x59bca78de36cec055fc1bd299ebc570be624e21f047e6fc3234fd11425e1e1f529320470d059360188731a65006599438a4710de7abbf38bd5260d5617f6569b1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}