{
  "manageEntity": {
    "action": "Save",
    "entityId": "1189710825",
    "entityType": "Track",
    "nonce": "0xbe2f5685dcedb96aca6b8da3d8ccfe7123c706cd296a7fce3e714dabb7809d60",
    "signature": "0xf2fd244098b1f8f5c03feb286cb8b962176a186a0d118abeadcda1037113e6e1739b1876262891fd17152bfd1f277018cc4d85249e025bf818b2d0e120228ca71c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}