{
  "manageEntity": {
    "action": "Save",
    "entityId": "1371412243",
    "entityType": "Track",
    "nonce": "0x6197d17df66721c141a5ee7545c2ebbe56bb0bcf8f272d87f0531cb0007d97ae",
    "signature": "0xd0c6a30a2828761eecad0f4550a92ef4e2418c97e5aec3579929d692e4f9e13902686589a9259caa1b0c1fb3cddb8e77bb0fafb9b44b53cc483d592537e5745c1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}