{
  "manageEntity": {
    "action": "Save",
    "entityId": "768127547",
    "entityType": "Track",
    "nonce": "0xa358b25a04b385eac2be97378e69b074e7fdeca03e450e68040353d4166cdd49",
    "signature": "0xca596338e0cbdc78b0846f4726b24d6e8ad79cd0341dac78819d2d8b32897e6e54c007dc035c31a196384e1207635b3e2094b7284f598aa46544687a52dd33921b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}