{
  "manageEntity": {
    "action": "Save",
    "entityId": "247019307",
    "entityType": "Track",
    "nonce": "0xed764a4e82bcfec09bda9ab0a7864abaedb5a6d99a114e7bb6daefb3f92d11c4",
    "signature": "0x5fd9e2f98bf44f62b260c2508407071ac87691cadc439c81b9e89a0705e3a6042f97765ca42caf84259cb4a67700940ab66b1fd5a4c4c7858a58433e4ad231f01b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}