{
  "manageEntity": {
    "action": "Save",
    "entityId": "1385946807",
    "entityType": "Track",
    "nonce": "0x16365bc88344ca5a5a1d26fbc4c7e70a69983afa71fc912c55c4b5f6023ec385",
    "signature": "0x651a1970f6d035970c2a29c2a46fd0c599ddafe0ba70e61ee2fc732e5ea3779a5a3a8181fd1c3b4243c73891dbe00ddf7d3f73fbeccdfa72271e8193a30643931b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}