{
  "manageEntity": {
    "action": "Save",
    "entityId": "1290664130",
    "entityType": "Track",
    "nonce": "0x734d33dae39fe8cbe8abb4a1d62c921db03a64ad01ec38472ef830b95cf75fe9",
    "signature": "0x6b38f16b21cebe8b30f2e23de8b2aafba27ece7161455a6105fa9cec038666511c0a8f280703e6cc9d4d9a136888334102a69705a02b4522d136554448eace5b1c",
    "signer": "0xD7c3dC9EEf2D94568C0e1A9C88b58696850c7C22",
    "userId": "125737"
  }
}