{
  "manageEntity": {
    "action": "Save",
    "entityId": "566860244",
    "entityType": "Track",
    "nonce": "0x1626aa16beaf120acd53a549be7dd5d43fcfc3b6e2b2619961a7626b5c8ee853",
    "signature": "0xe2d939c101ecc31d8fee97450a1685b57e292530d67d18009ff1e0c4cb7c1507770b985af02e2efaf3a597c3989a2882bf646e35dc35914dc873c87440fd2a701c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}