{
  "manageEntity": {
    "action": "Save",
    "entityId": "319051",
    "entityType": "Track",
    "nonce": "0x51543cb09198ac780769ce946d046867e047fc8c834a4e66fc7cdb43db55894f",
    "signature": "0x3d80e28be3ab97c6fe130ab0b7a012bf5ab458ee42d25195197f7c9f45c9c4ab61644448d365b034388288294e284eccb6929d297348cc4ad514559026f53a9e1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}