{
  "manageEntity": {
    "action": "Save",
    "entityId": "1470257621",
    "entityType": "Track",
    "nonce": "0xe00627dd25d907f7144ccff49f4afbf27b9b178d4570b232acbe35147c59cf31",
    "signature": "0xa615195e89d67bdc9d94a8f8f5d131ae8e4734ff994f4bdfaa8855466f4aff95073de0a58182b951d15f305c62efe7525d997fd0ce3e29b83cb7afc8430b8fff1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}