{
  "manageEntity": {
    "action": "Save",
    "entityId": "1441258975",
    "entityType": "Track",
    "nonce": "0x9ea4b925f6e2fed7e7ba42859a0762a182833428d2c98256f67f72665d757b22",
    "signature": "0x289b1edd15897130bc39652601f6be3e38b4cba51b2ce276ae57dfb924898b2f23a368e90fa7c9d134e58c2a9379c48e1d4fa555ec52a609011c12d6834f59db1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}