{
  "manageEntity": {
    "action": "Save",
    "entityId": "56654798",
    "entityType": "Track",
    "nonce": "0xa279799fdb15968700d39ba3c955622d86bcf9b524fc577a7b906691943e555d",
    "signature": "0x019905223f47a3bfb281ba7cf32b09bcbb36c283a98a493209000645953fe22e02da22a5654cd807105ad2f74a0430a96e3a63ecedc231e22aa0241b5329166d1c",
    "signer": "0x88602394b9baf0757a2CbE35FC3fBdb9E75b6DEb",
    "userId": "129329734"
  }
}