{
  "manageEntity": {
    "action": "Save",
    "entityId": "185436",
    "entityType": "Track",
    "nonce": "0x5f828929af81737e67d3f44e5e4436234ac5eb16579a6f6fb6bf81c227585dfb",
    "signature": "0xde979e8a36cb5952a9330c3af2c3b44187d82f069142cb5d7d52baca3dc2420a330a56f68a021660a852c9a4e4f3bd74529b7fda53874d2252bdc38e5389e8da1c",
    "signer": "0x849938DF063059EbF6d907f55E72C083347C9343",
    "userId": "796529120"
  }
}