{
  "manageEntity": {
    "action": "Save",
    "entityId": "1062537459",
    "entityType": "Track",
    "nonce": "0xcac03edc9739aa13851e6027f4c20c883d65ec7ab02a8f0b3069798f093609fa",
    "signature": "0x1058f19d1b55aed621f526b46bb56c364915852bed2b884cddde4947b0c7b11b27319d0b590d6ed24995cfbed0654dba3ac8e72e0b7ab25755e54c28ae0801951b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}