{
  "manageEntity": {
    "action": "Save",
    "entityId": "1181749656",
    "entityType": "Track",
    "nonce": "0x07c3569cb8ad4c56807b4eb4c009a395dbd83048f5ac06430eb4208e6b057924",
    "signature": "0x251ff4287f7b73a3cf6a6bce99065c581b4d34ebd54a17a911a25b6677fef34b0348a7afd3d7f114f7f4d62823c1cb4cfdfc75314a25f27f848fc263871b9e8b1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}