{
  "manageEntity": {
    "action": "Save",
    "entityId": "259863533",
    "entityType": "Track",
    "nonce": "0x67e837714bffe2e497a2943e0da1023fbe635cc99fb48b2d58511bc3be4d124b",
    "signature": "0x09668e706cbc9b8b359dbd65c66873224fef1f0ca8f159d464dc2f8312f06bcc0b47fe11876662e53ecab25903741d76d4fccf3302afd1359f7e2f5246097b9b1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}